Dressing-machine for floors, &amp;c.



` 1.` A. CAMPBELL. DRESSING MACHINE FOR FLooRs, aac.

APPLICATION FILED MAY 7. 19l8.

Patented Sept. 17, 1918.-

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UMTE SA JOHN A. CAMFBELL, OIF QUINCY, MASSACHUSETTS.

. DRESSING-MACHINE FOR FLOORS, 660.

Specncaton of Letters ,Patent g Patented Sept. 17, 1918.

.Application filed May 7, 1918. Serial No. 23Z1,036.-\`

To all 'whom it may concern:

Be it known that-I, J on'N A. CA-rrrnim, a citizen of. the United States, residing at Quincy,y in the county ofA Norfolk and State of Massachusetts, have invented. new and useful Improvements in Dressing-Machines for Floors, &c., of which thek following is a specication.

This invention relates chiefly to a machine for imparting smooth surfaces vto iioors and other structures, either of wood, orA any other material, capable of being reduced or worn away byv a rotating abrasive. tool, pressed while rotating against the surface on which it acts, the machine being movable by the operator, to extend the grinding and polishing action in various directions The invention consists in .the improvements lhereinafter described and. claimed.

Ofthe accompanying drawings forming a part of this specification,- Y

Figure 1 is a plan view of a. machine embodying the invention. j

- Fig. 2 is a section on the plane of line the motor being shown in elevation.

Fig. 3 is an end view, certain parts being omitted.

i Fig. 4 is a plan view of a portion of the body of the machine. i f Fig. 5 is a section-on line 5-5 of Fig. 4.

Fig. 6 is a section-on line 6-6 of Fig. 4, the-motor and certain other parts being removed. Y v

' The same reference characters indicate the same parts in all of the figures.

12 represents a body adapted to'be supported by and to tilt'lengthwise on the running gear hereinafter described, 'said body being preferably oblong, as shown by Fig. 1, and provided at one end with a vertical bearing 13, and above this with a horizontal bearingV 14. I .use the Vterms vertical and it being understood that when the body is tilted or inclined from a horizontal position the bearing 13 is not absolutely vertical, and the bear-ing 14 is not absolutely horizontal. Said bearings are a part of an upstanding bracket, the Vbase of which is secured to the body. j

The removable top portion of the bearing 14 is secured to the lower portion thereofby bolts 15. The vertical bearing 13 projects forward from the body portion of the bracket, and the bearing 14 islocated at the upper end of saidbody portion; Each bearingis therefore exposed and adapted to he.V

conveniently lubricated. v

In the bearingv 13 is journalcd a vertical tool-operating shaft 16, the lower endl of which is provided with a bevel gear 17, and

its upper end with a bevel gear 18.

bracket 20 attached to the frame of the machine and having arms or ears 21, supports a shaft 22 and the shaft 23 of a cylindrical abrading tool 24 adapted to act on a floor, orother surface. with a bevel gear 22a meshing with the gear 17, `and with spur gears 22b meshing with spur gears 23h on the tool shaft 23.

The end of the body opposite the. end hav- The shaft 22 is provided ing the bearing 13 is provided with rigidly .15.;

attachedpush bars 25 connected by a crossbar 26, these forming a controlling handle.

The body 12 is provlded with running gear permitting; yits convenient transportation, and also permitting it to tilt and exert downward pressure on the tool, and compensate for wear thereof. Said running gear includes a transverse axle 27 located under the body between the ends thereof, and provided with a pair of traction wheels 28, f

which may have rubber tires, if desired. The axle is rigidly connected with the body, and the arms of the axle on which the wheels are journaled, by turning slightly in the wheel hubs, permit a longitudinal tilting of the body. Y

' The connections between the axle and the body are of such nature that the body is adjustable toward and from the axle tovary its height. tical twin lower ends in the. axle, rotated to raise and lower the body. standards are screw-threaded above the standards 29, journaledV at their and adapted -to` be The axle,

Said connections comprise verand are adjustably connected with the body 12, to permit thev body to be raised and lowered.v

The standards 29 pass through slots 30 in the body 12, and are engaged with nuts 31 bearing on the upper surface of the body at opposite edges of the slots. The standards 29 pass through openings in a crossbar 32 which is in lsliding contact with the under side of the body 12. Clamping wing nuts 33 engaged'with the threads Vof the standards 29 bear on the under side of the bar 32. When said nuts are tightened, the bar 32 and nuts 31 are clamped against the lower and 'fupper sides ofthe body 12, respectively, so that the standards 29 are prevented from moving lengthwise of the body, and are alsoprevented from rotating in the nuts 3l. When the clamping nuts 33 are loosened, the' standards 29' are or lo t will be seen that the above-described 5 free to be rotated, and thus raise the nuts 3l, rotation of said nuts b g' vented by portions 31ai ther ject into the slots 30.

l are rotated t0 1 he nuts 31the clamp- 1o "ing" nuts rotated' to lower the nutsv 31;, the clamping nutsl 33 are' correspondingly lowered. Longitudinal adjustment ofthe standards 29" relatively toi the bo'dy`l2 is effected by moving the bar32 by means of an adjusting screw 36 journal'edy in a bearing 37 attached' to the body 12 and having a screwthreadedenga'gement with a tapped orifice in an ear 37 on the bar 32, the clamping nuts being loosened. The adjusting-screw 36' is provided with'L a' handV wheel' 38 wherei by it maybe 'rotated to simultaneously adjust the standards 29 length-wis'eof the body 12.

The" vertical adjustability o f the body 12 enables thebody to be raised to ya nii'nimun'i height when the' operating tool1 is pracl ti'eally unvvorn, and to be lowered to com. pensate for wear ,of the acting 'face of the tool.

The' longitudinal adjustability of the body lf2 relatively to the running' gear perlnitsregulation of the degree'of downward pressure exertedV by the" body and its ad juncts on the tool, this pressure increasing with an increase of the distance between the tool-operating shaft 1.6 and the running gear.

A motor 40 of any suitable type is mountedl Von the body at a suitable point between the ends thereof. I have here shownfmore or less conventionally an electric motor supplied with current through a flexible cable 4l, the circuit connections including a switch 42 mounted on the frame ofthe motor, and so arranged that the current can be turned on and off conveniently by an operator graspincr' the controlling handle. A gasolene or ot -er suitable motor may be used instead of an electric' motor.

The shaft 43 of the motor is connected with the tool-operating shaft 1'6 by the means next described. 44 represents a horizontal shaft journaled inthebearing 14 and Y proiu'ded Vat one end withV a` spur gear 46 and at the other end with a bevel gear 47. The motor lsha-ft 43 is provided witha spur .'geai'",` not showin/meshing withv the gear 46,

and the bevel gear 18 on the toolloperating are correspondingly turned to ma (in the cross-bar 32 in contact with /lnf/body 112,- andf said body incontact with 1e nuts' 3l.v When' the standards are .Shaft 1.6 meshes' withpheffgear 47. The said gearsl are pipprtiied to suitably reduce the speeds-'etieen the motor shaft andthe to rating shaft.

machine is of simple construction and adapted to maintain the acting portions of a rotary grinding or polishing wheel :in suitable contact with a floor, regardless of the reduction inftheheightl of the tool' due to'w'ear. It will also bey'seenfthat the downward5 pressure of the-tool against the-floor may be conveniently"varied' as the'V work may require. v

I- claim:+

l. A machine of the character stated, comprising a body having 'longitudinal slots,--ru`nning gear including an axle and wheels thereon, screw-threadedl standards journaledV in the Vaxle and projecting upwardly therefroin throughV said' slots,A` nuts engaged with saidf'standard's above thebodfy andI coni'ned against rotation, a cross-bar movable.- onv the underside olf-'the body and l `havin g orifices through which the standards pass, clamping-H nut's engaged;V 'with said standards below the body and.y adapted to bea-r' on said cross" bar and support the bod-yl at variou's'heights, andi adjusting screw journaled Vin a bearing` onV the body 1 and havinga screw-thread connection` with said cross bar, wherebythe' cross Yb`ar, stand-V -ards,-` and running adjusted' relatively tothe body.

' 2. A machine of the characterspecilied, .comprisingv a body havingla'vertieallbearing and upper and lower pairs of horizon-tail bearings below the" vertical bearing, a -vertical shaft journaled intl-'1e' vertical bearing and having abevell gea-'r at .itsl lower end,

a horizontalV shaft journaledv in the upper horizontal bearings andhavingL a bevel .gear meshing with the bevel gear on the vertical shaft, and a pair of spaced apart spur gears at opposite sides of said bevel gear,v a rotary cylindrical dressing v.tool whose shaft. is

parallel with the horizontal Vshaft and is journaled in the' lower horizontal bearings and provided' with spur gears meshinggwith the spur gearslon the said horizontal shaft, a motor mounted on said body, driving connections between the' motor. sha-ft and' the l said vertical shaft,y and running 'gear in* clu'ding an axle secured 'tothefbody parallel withv said horizontalV shaft and with the aXis of said tool and wheels onlsai-d'axle constituting bearings which permit the body to Y'swingcand raise and lower lsaidtool.

In testimony whereof? I havey aiiiXe'd my signa-ture'.V i

Jenn CAMPBELL.

copi-'eetl' thispartent may lie obtained for ve ccts each; by" addres'silg the Commissioner of.v Istfen'fts,` Y Washingtoyllc'." 'f

gear'may be horizontally 

